Make sure your iPad's data is properly backed up. When you're connected to your Mac or PC, open up iTunes and right-click on your iPad in the Devices list and select Back up. You don't need to worry about Apps you've downloaded or any purchases - videos, music - they're always available to you from Apple. Content you've created, such as photos and videos is what's important and at risk of loss when the iPad dies. You can also use an offsite service.